Game client crash when save a blueprint (no mod)

Hello, I've some problem to use blueprint in Satisfactory (vanilla)...
SIngle player, new Game (actual build), epic

When I save a blueprint, In my menu, the blueprint is here, but "file missing" when I click on it (cf. screenshot)
If I re-save the same blueprint with the same name, confirm override, the game crash... (cf. screenshot)
Full vanilla game, no mod, check file ok, and reproducible on a friend computer (no mod either).
The first save was done on my steam deck, then sync with epic and resume on my PC.

I can save blueprint on another save, but not on this one, so I don't think is a permission access and I think is linked to my save.

I've this in my game log (on 2 differents computers, full log in attachements)
[2024.11.27-14.33.36:486][844]LogFactoryBlueprint: Warning: Failed To Write New Blueprint Blueprint to Disk!
[2024.11.27-14.33.37:352][844]LogWindows: Error: === Critical error: ===
[2024.11.27-14.33.37:352][844]LogWindows: Error: 
[2024.11.27-14.33.37:352][844]LogWindows: Error: Fatal error!
[2024.11.27-14.33.37:352][844]LogWindows: Error: 
[2024.11.27-14.33.37:352][844]LogWindows: Error: Unhandled Exception: EXCEPTION_ACCESS_VIOLATION writing address 0x0000000000000000
[2024.11.27-14.33.37:352][844]LogWindows: Error: [Callstack] 0x00007ff815f2f554 FactoryGameEGS-FactoryGame-Win64-Shipping.dll!FBlueprintHeader::UpdateHeaderDataWithNewData() 


Could you please help me?

Thank you !
Solution
do you have any weird characters in your save session name, like dots, slashes spaces at end etc?
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